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- Title
Enhanced dielectric properties of poly(vinylidene fluoride) by introducing copper indium disulfide quantum dots.
- Authors
Zhao, Xiaojia; Li, Chaoqun; Yin, Fangqian; Yao, Decui; Hu, Junping; Li, Dong; Peng, Guirong
- Abstract
A series of polyvinylidenfluoride (PVDF)-based composite films with different amounts of copper indium disulfide quantum dots (CuInS2 QDs) were prepared via solution casting and thermal treatment. With the addition of CuInS2 QDs, phase transition occurred from α phase to β and γ phase. The dielectric constant increased markedly from 11.4 of PVDF to 23.6 of 2% CuInS2 QDs/PVDF composite films at 20 Hz, and the Tanδ of composite films decreased at above 1 kHz at room temperature. As temperature increases, the Curie points (Tc) of all films appeared and shifted to higher temperature, and the shift was more significant with higher CuInS2 QDs content. The Tanδ of the composite films was visibly lower than that of pure PVDF above 150 °C. Furthermore, the σac of CuInS2 QDs/PVDF composite films slightly increased and remained lower than 106 S/m at 1 kHz, indicating that the CuInS2 QDs/PVDF composite films could be potential candidates for dielectric material.
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 11, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-10415-9